In this program i'm facing two problems when i close the JDialog the dialog doesn't close properly like EXIT_ON_CLOSE.And how to give title to this dialog.
Code
public class Dialog extends JDialog{
public Dialog(){
setSize(300,200);
setLocationRelativeTo(null);
setVisible(true);
}
}
Main Method
public class Main {
public static void main(String[] args) {
Dialog frame = new Dialog();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
int result = JOptionPane.showConfirmDialog(frame, "Are you sure you want to exit the application? ",
"EXIT Application", JOptionPane.YES_NO_OPTION);
if (result == JOptionPane.YES_OPTION)
System.exit(0);
else if (result == JOptionPane.NO_OPTION) {
frame.setDefaultCloseOperation(frame.DO_NOTHING_ON_CLOSE);
}
}
});
}
}
not like EXIT_ON_CLOSE
EXIT_ON_CLOSE is not supported for a JDialog.
but DISPOSE_ON_CLOSE close the dialog slowly
It closes the dialog immediately and focus will go back to the parent JFrame.
Is there a way that i can Close the whole program in JDialog
You need to close the frame.
Maybe you are trying to close the application from a popup dialog? If so then check out Closing an Application.
It will show you how to:
Use a WindowListener to handle windowClosing and display a popup dialog, or
use the suggested class to make the coding easier.
Related
I have a program with a GUI that needs to open a separate window and wait for the user to select and option, then continue. I figure I should be doing this with the wait() and notify() methods, but I'm still trying to figure out exactly how to use those. A complicating factor is that things seem to work differently when the second window is created in an actionPerformed() method, which it needs to be.
Here's how I think it should be done here, apparently it is not quite right...
This should create a window with a button, when the button is pressed, another window with a button should be created, and when that button is pressed, the program should print "End".
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class WtfExample {
public static void main(String[] args) {
JFrame jf = new JFrame();
JButton butt = new JButton("Button");
butt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
WtfExample we = new WtfExample();
we.display();
}
});
jf.getContentPane().add(butt);
jf.setSize(new Dimension(1000, 500));
jf.setVisible(true);
System.out.println("End");
}
public synchronized void display() {
JFrame jf = new JFrame();
JButton butt = new JButton("Button");
butt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
synchronized(WtfExample.this) {
WtfExample.this.notifyAll();
}
}
});
jf.getContentPane().add(butt);
jf.setSize(new Dimension(1000, 500));
jf.setVisible(true);
while(true) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
break;
}
}
}
}
edit- I wasn't clear enough in one thing- the second window that's opened is blank, like its components were never added to it. That's the case whether it's a frame or dialog, but that only happens if the window is created from the actionPerformed method.
No, you should just be using a JDialog.
You need a modal dialog window. Here's a tutorial on dialogs. It is easier to use JOptionPane for the simple cases.
A Dialog can be modal. When a modal Dialog is visible, it blocks user input to all other windows in the program.
As the other two answers suggest you need a modal JDialog. You do not need to deal with any Thread classes. The JDialog window will deal with the giving you control back once the user input is handled. There are a few ways you can set the dialog box modal. Here are two examples.
new JDialog(Dialog owner, boolean modal)
or
new JDialog(Dialog owner, String title, boolean modal)
You could also do something like this:
JDialog dialog = new JDialog(owner);
dialog.setModal(true);
I think this is a pretty good article about modality in JAVA.
I am designing a project in NetBeans. For that I need to display a jdialog as a login window at first. But if I run the project both jframe and jdialog will appear. How can I hide jframe and how to set jdialog as a starting one in my project?
I wrote
LoginDlg.setVisible(true);
this.setVisible(false);
In construcor.
Start by taking a look at How to Make Dialogs
You want to make the JDialog a modal dialog, so that it will stop the execution of additional code.
In your program launch code, you want to show the dialog first, then, based on what the user does, show the main frame.
Alternatively, you could use a CardLayout, see How to Use CardLayout for more details, which will allow you to switch the active view based on your needs
In your main method, show only the dialog. Then add a button or something(e.g timer) that hides the dialog, and add a listener to that dialog so when the dialog disposes the main frame is shown.
public class JavaApplication3{
private static JFrame f = new JFrame("alabala");
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
final JDialog d = new JDialog();
d.add(new JLabel("pla"));
d.setVisible(true);
Timer t1 = new Timer(1000, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
d.dispose();
}
});
t1.setRepeats(false);
t1.start();
d.addWindowListener(new WindowAdapter() {
#Override
public void windowClosed(WindowEvent e) {
f.pack();
f.setVisible(true);
}
});
}
}
first sorry for my bad english.
Hi, i'm trying to use a confirmDialog with a YES_NO_OPTION.
what i want is that when i close a frame a confimDialog will be displayed asking me if want to close.
if i press yes everyThing most be closed, if i press no the confirmDialog will disapear
but the problem is even if i press no button the frame close this is my code:
final JFrame frame = new JFrame("2D Game");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1600,600);
frame.setResizable(false);
private void continuerButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_continuerButtonActionPerformed
int level=getlevel();
System.out.println(niveau);
if(niveau == 1)
{
this.dispose();
frame.add(new Board());
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e)
{
doExitOption();
}
});
}
}
and this is doExitOption methode:
public void doExitOption()
{
int option=JOptionPane.showConfirmDialog(null, "do you want to quit the game", "Warnning",JOptionPane.YES_NO_OPTION);
if(option == JOptionPane.YES_OPTION)
{
frame.dispose();
}
}
See Closing an Application. It can manager the default close operation for you.
You need to change the JFrame's default close operation so that your call to dispose is the only call being made to dispose the window:
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
Change Default closing of JFrame to DO_NOTHING_ON_CLOSE .
I want to call a method confirmExit() when the red close button of the title bar of a JFrame is clicked.
How can I capture that event?
I'd also like to prevent the window from closing if the user chooses not to proceed.
import javax.swing.JOptionPane;
import javax.swing.JFrame;
/*Some piece of code*/
frame.addWindowListener(new java.awt.event.WindowAdapter() {
#Override
public void windowClosing(java.awt.event.WindowEvent windowEvent) {
if (JOptionPane.showConfirmDialog(frame,
"Are you sure you want to close this window?", "Close Window?",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE) == JOptionPane.YES_OPTION){
System.exit(0);
}
}
});
If you also want to prevent the window from closing unless the user chooses 'Yes', you can add:
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
Override windowClosing Method.
public void windowClosing(WindowEvent e)
It is invoked when a window is in the process of being closed. The close operation can be overridden at this point.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
also works. First create a JFrame called frame, then add this code underneath.
This may work:
jdialog.addWindowListener(new WindowAdapter() {
public void windowClosed(WindowEvent e) {
System.out.println("jdialog window closed event received");
}
public void windowClosing(WindowEvent e) {
System.out.println("jdialog window closing event received");
}
});
Source: https://alvinalexander.com/java/jdialog-close-closing-event
This is what I put as a menu option where I made a button on a JFrame to display another JFrame. I wanted only the new frame to be visible, and not to destroy the one behind it. I initially hid the first JFrame, while the new one became visible. Upon closing of the new JFrame, I disposed of it followed by an action of making the old one visible again.
Note: The following code expands off of Ravinda's answer and ng is a JButton:
ng.addActionListener((ActionEvent e) -> {
setVisible(false);
JFrame j = new JFrame("NAME");
j.setVisible(true);
j.addWindowListener(new java.awt.event.WindowAdapter() {
#Override
public void windowClosing(java.awt.event.WindowEvent windowEvent) {
setVisible(true);
}
});
});
Try this:
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
It will work.
I have a program with a GUI that needs to open a separate window and wait for the user to select and option, then continue. I figure I should be doing this with the wait() and notify() methods, but I'm still trying to figure out exactly how to use those. A complicating factor is that things seem to work differently when the second window is created in an actionPerformed() method, which it needs to be.
Here's how I think it should be done here, apparently it is not quite right...
This should create a window with a button, when the button is pressed, another window with a button should be created, and when that button is pressed, the program should print "End".
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class WtfExample {
public static void main(String[] args) {
JFrame jf = new JFrame();
JButton butt = new JButton("Button");
butt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
WtfExample we = new WtfExample();
we.display();
}
});
jf.getContentPane().add(butt);
jf.setSize(new Dimension(1000, 500));
jf.setVisible(true);
System.out.println("End");
}
public synchronized void display() {
JFrame jf = new JFrame();
JButton butt = new JButton("Button");
butt.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
synchronized(WtfExample.this) {
WtfExample.this.notifyAll();
}
}
});
jf.getContentPane().add(butt);
jf.setSize(new Dimension(1000, 500));
jf.setVisible(true);
while(true) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
break;
}
}
}
}
edit- I wasn't clear enough in one thing- the second window that's opened is blank, like its components were never added to it. That's the case whether it's a frame or dialog, but that only happens if the window is created from the actionPerformed method.
No, you should just be using a JDialog.
You need a modal dialog window. Here's a tutorial on dialogs. It is easier to use JOptionPane for the simple cases.
A Dialog can be modal. When a modal Dialog is visible, it blocks user input to all other windows in the program.
As the other two answers suggest you need a modal JDialog. You do not need to deal with any Thread classes. The JDialog window will deal with the giving you control back once the user input is handled. There are a few ways you can set the dialog box modal. Here are two examples.
new JDialog(Dialog owner, boolean modal)
or
new JDialog(Dialog owner, String title, boolean modal)
You could also do something like this:
JDialog dialog = new JDialog(owner);
dialog.setModal(true);
I think this is a pretty good article about modality in JAVA.